qwebpage.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

                    visitedWebActions->setBit(action);
                }
                break;
            }
            case WebCore::SeparatorType:
                menu->addSeparator();
                break;
            case WebCore::SubmenuType: {
                QMenu *subMenu = createContextMenu(webcoreMenu, item.platformSubMenu(), visitedWebActions);

                bool anyEnabledAction = false;

                QList<QAction *> actions = subMenu->actions();
                for (int i = 0; i < actions.count(); ++i) {
                    if (actions.at(i)->isVisible())
                        anyEnabledAction |= actions.at(i)->isEnabled();
                }

                // don't show sub-menus with just disabled actions
                if (anyEnabledAction) {
                    subMenu->setTitle(item.title());
                    menu->addAction(subMenu->menuAction());
                } else {
                    delete subMenu;
                }
                break;
            }
        }
    }
    return menu;
}
#endif // QT_NO_CONTEXTMENU

QWebFrame *QWebPagePrivate::frameAt(const QPoint &pos) const
{
    QWebFrame *frame = mainFrame;

redo:
    QList<QWebFrame*> children = frame->childFrames();
    for (int i = 0; i < children.size(); ++i) {
        if (children.at(i)->geometry().contains(pos)) {
            frame = children.at(i);
            goto redo;
        }
    }
    if (frame->geometry().contains(pos))
        return frame;
    return 0;
}

void QWebPagePrivate::_q_webActionTriggered(bool checked)
{
    QAction *a = qobject_cast<QAction *>(q->sender());
    if (!a)
        return;
    QWebPage::WebAction action = static_cast<QWebPage::WebAction>(a->data().toInt());
    q->triggerAction(action, checked);
}

#ifndef NDEBUG
void QWebPagePrivate::_q_cleanupLeakMessages()
{
    // Need this to make leak messages accurate.
    cache()->setCapacities(0, 0, 0);
}
#endif

void QWebPagePrivate::updateAction(QWebPage::WebAction action)
{
    QAction *a = actions[action];
    if (!a || !mainFrame)
        return;

    WebCore::FrameLoader *loader = mainFrame->d->frame->loader();
    WebCore::Editor *editor = page->focusController()->focusedOrMainFrame()->editor();

    bool enabled = a->isEnabled();
    bool checked = a->isChecked();

    switch (action) {
        case QWebPage::Back:
            enabled = loader->canGoBackOrForward(-1);
            break;
        case QWebPage::Forward:
            enabled = loader->canGoBackOrForward(1);
            break;
        case QWebPage::Stop:
            enabled = loader->isLoading();
            break;
        case QWebPage::Reload:
            enabled = !loader->isLoading();
            break;
        case QWebPage::Cut:
            enabled = editor->canCut();
            break;
        case QWebPage::Copy:
            enabled = editor->canCopy();
            break;
        case QWebPage::Paste:
            enabled = editor->canPaste();
            break;
#ifndef QT_NO_UNDOSTACK
        case QWebPage::Undo:
        case QWebPage::Redo:
            // those two are handled by QUndoStack
            break;
#endif // QT_NO_UNDOSTACK
        case QWebPage::MoveToNextChar:
        case QWebPage::MoveToPreviousChar:
        case QWebPage::MoveToNextWord:
        case QWebPage::MoveToPreviousWord:
        case QWebPage::MoveToNextLine:
        case QWebPage::MoveToPreviousLine:
        case QWebPage::MoveToStartOfLine:
        case QWebPage::MoveToEndOfLine:
        case QWebPage::MoveToStartOfBlock:
        case QWebPage::MoveToEndOfBlock:
        case QWebPage::MoveToStartOfDocument:
        case QWebPage::MoveToEndOfDocument:
        case QWebPage::SelectAll:
        case QWebPage::SelectNextChar:
        case QWebPage::SelectPreviousChar:
        case QWebPage::SelectNextWord:
        case QWebPage::SelectPreviousWord:
        case QWebPage::SelectNextLine:
        case QWebPage::SelectPreviousLine:
        case QWebPage::SelectStartOfLine:
        case QWebPage::SelectEndOfLine:
        case QWebPage::SelectStartOfBlock:
        case QWebPage::SelectEndOfBlock:
        case QWebPage::SelectStartOfDocument:
        case QWebPage::SelectEndOfDocument:
        case QWebPage::DeleteStartOfWord:
        case QWebPage::DeleteEndOfWord:
        case QWebPage::SetTextDirectionDefault:
        case QWebPage::SetTextDirectionLeftToRight:
        case QWebPage::SetTextDirectionRightToLeft:
        case QWebPage::ToggleBold:
        case QWebPage::ToggleItalic:
        case QWebPage::ToggleUnderline:
            enabled = editor->canEditRichly();
            if (enabled)
                checked = editor->command(editorCommandForWebActions(action)).state() != FalseTriState;
            else
                checked = false;
            break;
        default: break;
    }

    a->setEnabled(enabled);

    if (a->isCheckable())
        a->setChecked(checked);
}

void QWebPagePrivate::updateNavigationActions()
{
    updateAction(QWebPage::Back);
    updateAction(QWebPage::Forward);
    updateAction(QWebPage::Stop);
    updateAction(QWebPage::Reload);
}

void QWebPagePrivate::updateEditorActions()
{
    updateAction(QWebPage::Cut);
    updateAction(QWebPage::Copy);
    updateAction(QWebPage::Paste);
    updateAction(QWebPage::MoveToNextChar);
    updateAction(QWebPage::MoveToPreviousChar);
    updateAction(QWebPage::MoveToNextWord);
    updateAction(QWebPage::MoveToPreviousWord);
    updateAction(QWebPage::MoveToNextLine);
    updateAction(QWebPage::MoveToPreviousLine);
    updateAction(QWebPage::MoveToStartOfLine);
    updateAction(QWebPage::MoveToEndOfLine);
    updateAction(QWebPage::MoveToStartOfBlock);
    updateAction(QWebPage::MoveToEndOfBlock);
    updateAction(QWebPage::MoveToStartOfDocument);
    updateAction(QWebPage::MoveToEndOfDocument);
    updateAction(QWebPage::SelectAll);
    updateAction(QWebPage::SelectNextChar);
    updateAction(QWebPage::SelectPreviousChar);
    updateAction(QWebPage::SelectNextWord);
    updateAction(QWebPage::SelectPreviousWord);
    updateAction(QWebPage::SelectNextLine);
    updateAction(QWebPage::SelectPreviousLine);
    updateAction(QWebPage::SelectStartOfLine);
    updateAction(QWebPage::SelectEndOfLine);
    updateAction(QWebPage::SelectStartOfBlock);
    updateAction(QWebPage::SelectEndOfBlock);
    updateAction(QWebPage::SelectStartOfDocument);
    updateAction(QWebPage::SelectEndOfDocument);
    updateAction(QWebPage::DeleteStartOfWord);
    updateAction(QWebPage::DeleteEndOfWord);
    updateAction(QWebPage::SetTextDirectionDefault);
    updateAction(QWebPage::SetTextDirectionLeftToRight);
    updateAction(QWebPage::SetTextDirectionRightToLeft);
    updateAction(QWebPage::ToggleBold);
    updateAction(QWebPage::ToggleItalic);
    updateAction(QWebPage::ToggleUnderline);
}

void QWebPagePrivate::timerEvent(QTimerEvent *ev)
{
    int timerId = ev->timerId();
    if (timerId == tripleClickTimer.timerId())
        tripleClickTimer.stop();
    else
        q->QObject::timerEvent(ev);
}

void QWebPagePrivate::mouseMoveEvent(QMouseEvent *ev)
{
    WebCore::Frame* frame = QWebFramePrivate::core(mainFrame);
    if (!frame->view())
        return;

    bool accepted = frame->eventHandler()->mouseMoved(PlatformMouseEvent(ev, 0));
    ev->setAccepted(accepted);
}

void QWebPagePrivate::mousePressEvent(QMouseEvent *ev)
{
    WebCore::Frame* frame = QWebFramePrivate::core(mainFrame);
    if (!frame->view())
        return;

    if (tripleClickTimer.isActive()
            && (ev->pos() - tripleClick).manhattanLength()
                < QApplication::startDragDistance()) {
        mouseTripleClickEvent(ev);
        return;
    }

    bool accepted = false;
    PlatformMouseEvent mev(ev, 1);
    // ignore the event if we can't map Qt's mouse buttons to WebCore::MouseButton
    if (mev.button() != NoButton)
        accepted = frame->eventHandler()->handleMousePressEvent(mev);
    ev->setAccepted(accepted);
}

void QWebPagePrivate::mouseDoubleClickEvent(QMouseEvent *ev)
{
    WebCore::Frame* frame = QWebFramePrivate::core(mainFrame);
    if (!frame->view())
        return;

    bool accepted = false;
    PlatformMouseEvent mev(ev, 2);
    // ignore the event if we can't map Qt's mouse buttons to WebCore::MouseButton
    if (mev.button() != NoButton)
        accepted = frame->eventHandler()->handleMousePressEvent(mev);
    ev->setAccepted(accepted);

    tripleClickTimer.start(QApplication::doubleClickInterval(), q);
    tripleClick = ev->pos();
}

void QWebPagePrivate::mouseTripleClickEvent(QMouseEvent *ev)
{
    WebCore::Frame* frame = QWebFramePrivate::core(mainFrame);
    if (!frame->view())
        return;

    bool accepted = false;
    PlatformMouseEvent mev(ev, 3);
    // ignore the event if we can't map Qt's mouse buttons to WebCore::MouseButton
    if (mev.button() != NoButton)
        accepted = frame->eventHandler()->handleMousePressEvent(mev);
    ev->setAccepted(accepted);
}

void QWebPagePrivate::mouseReleaseEvent(QMouseEvent *ev)
{
    WebCore::Frame* frame = QWebFramePrivate::core(mainFrame);
    if (!frame->view())
        return;

    bool accepted = false;
    PlatformMouseEvent mev(ev, 0);
    // ignore the event if we can't map Qt's mouse buttons to WebCore::MouseButton
    if (mev.button() != NoButton)
        accepted = frame->eventHandler()->handleMouseReleaseEvent(mev);
    ev->setAccepted(accepted);

#ifndef QT_NO_CLIPBOARD
    if (QApplication::clipboard()->supportsSelection()) {
        bool oldSelectionMode = Pasteboard::generalPasteboard()->isSelectionMode();
        Pasteboard::generalPasteboard()->setSelectionMode(true);
        WebCore::Frame* focusFrame = page->focusController()->focusedOrMainFrame();
        if (ev->button() == Qt::LeftButton) {
            if(focusFrame && (focusFrame->editor()->canCopy() || focusFrame->editor()->canDHTMLCopy())) {
                focusFrame->editor()->copy();
                ev->setAccepted(true);
            }
        } else if (ev->button() == Qt::MidButton) {
            if(focusFrame && (focusFrame->editor()->canPaste() || focusFrame->editor()->canDHTMLPaste())) {
                focusFrame->editor()->paste();
                ev->setAccepted(true);
            }
        }
        Pasteboard::generalPasteboard()->setSelectionMode(oldSelectionMode);
    }
#endif
}

#ifndef QT_NO_CONTEXTMENU
void QWebPagePrivate::contextMenuEvent(QContextMenuEvent *ev)
{
    QMenu *menu = q->createStandardContextMenu();
    if (menu) {
        menu->exec(ev->globalPos());
        delete menu;
    }
}
#endif // QT_NO_CONTEXTMENU

/*!
    \since 4.5
    This function creates the standard context menu which is shown when
    the user clicks on the web page with the right mouse button. It is
    called from the default contextMenuEvent() handler. The popup menu's
    ownership is transferred to the caller.
 */
QMenu *QWebPage::createStandardContextMenu()
{
#ifndef QT_NO_CONTEXTMENU
    QMenu *menu = d->currentContextMenu;
    d->currentContextMenu = 0;
    return menu;
#else
    return 0;
#endif
}

#ifndef QT_NO_WHEELEVENT
void QWebPagePrivate::wheelEvent(QWheelEvent *ev)
{
    WebCore::Frame* frame = QWebFramePrivate::core(mainFrame);
    if (!frame->view())
        return;

    WebCore::PlatformWheelEvent pev(ev);
    bool accepted = frame->eventHandler()->handleWheelEvent(pev);
    ev->setAccepted(accepted);
}
#endif // QT_NO_WHEELEVENT

#ifndef QT_NO_SHORTCUT
QWebPage::WebAction QWebPagePrivate::editorActionForKeyEvent(QKeyEvent* event)
{
    static struct {
        QKeySequence::StandardKey standardKey;
        QWebPage::WebAction action;
    } editorActions[] = {
        { QKeySequence::Cut, QWebPage::Cut },
        { QKeySequence::Copy, QWebPage::Copy },
        { QKeySequence::Paste, QWebPage::Paste },
        { QKeySequence::Undo, QWebPage::Undo },
        { QKeySequence::Redo, QWebPage::Redo },
        { QKeySequence::MoveToNextChar, QWebPage::MoveToNextChar },
        { QKeySequence::MoveToPreviousChar, QWebPage::MoveToPreviousChar },
        { QKeySequence::MoveToNextWord, QWebPage::MoveToNextWord },
        { QKeySequence::MoveToPreviousWord, QWebPage::MoveToPreviousWord },
        { QKeySequence::MoveToNextLine, QWebPage::MoveToNextLine },
        { QKeySequence::MoveToPreviousLine, QWebPage::MoveToPreviousLine },
        { QKeySequence::MoveToStartOfLine, QWebPage::MoveToStartOfLine },
        { QKeySequence::MoveToEndOfLine, QWebPage::MoveToEndOfLine },
        { QKeySequence::MoveToStartOfBlock, QWebPage::MoveToStartOfBlock },
        { QKeySequence::MoveToEndOfBlock, QWebPage::MoveToEndOfBlock },
        { QKeySequence::MoveToStartOfDocument, QWebPage::MoveToStartOfDocument },